One of my friend recently asked me this question about sorting the folders (not in alphabetical order) in a document library. The sort order has to be custom and user should be able to specify the order in which folders should appear. Example sort order

Top

Middle

Bottom

In order to implement this you can create a new folder content type and add an order column to this content type. You do need to have the appropriate rights to do so.

The steps would be as follows.

·Go to Site Actions

·Go to Site Settings

·Go to Site Content Types

·Click Create New

·Give it a name such as Folder Order

·Select Parent Content Type from as of Folder Content Types

·Select Folder as the Parent Content Type

·You can create a new group or leave it in custom content types

·Click OK

·At the content type settings click Add from new site column

·Create a site column called Item Order or something similar, select the type as Number

·Click OK

·Go to the list where you want the folders to be ordered

·Go to the list settings

·Go to Advanced Settings

·Select allow management of content types

·Select No for display new folder command on the new menu

·Click OK

·You should now see an area called content types, leave the document as is